CN109381039B - Food heating bag with double-layer nested structure - Google Patents
Food heating bag with double-layer nested structure Download PDFInfo
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- CN109381039B CN109381039B CN201811123386.XA CN201811123386A CN109381039B CN 109381039 B CN109381039 B CN 109381039B CN 201811123386 A CN201811123386 A CN 201811123386A CN 109381039 B CN109381039 B CN 109381039B
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J36/00—Parts, details or accessories of cooking-vessels
- A47J36/24—Warming devices
- A47J36/28—Warming devices generating the heat by exothermic reactions, e.g. heat released by the contact of unslaked lime with water
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Abstract
The invention discloses a food heating bag with a double-layer nested structure, which comprises a first heating bag and a second heating bag embedded in the first heating bag, wherein the first heating bag is of a bowl-like structure and comprises a hydrophobic top layer, a hydrophilic bottom layer arranged below the hydrophobic top layer and a first heating agent arranged in a containing cavity formed by the hydrophobic top layer and the hydrophilic bottom layer, and the second heating bag is formed by a hydrophilic packaging bag and a second heating agent arranged in the hydrophilic packaging bag. After water is added into the food heating bag provided by the invention, the bottom layer of the first heating bag absorbs water rapidly, aluminum water reacts to release heat and hydrogen, the second heating bag absorbs a small amount of water or water vapor to rapidly react with the aluminum water, and the hydrogen and the water vapor generated by the aluminum water reaction can be released only from the non-woven fabric at the bottom layer of the first heating bag, so that a condensation effect is achieved, low-temperature water vapor carried by the hydrogen is reduced, effective high-temperature water vapor is increased, the amount of the vapor is large, and the heat effect is improved remarkably.
Description
Technical Field
The invention relates to the technical field of self-heating food heating agent application, in particular to a food heating bag with a double-layer nested structure.
Background
The self-heating food heating agent is a novel heating agent which takes metal or non-metal chemical materials as raw materials, generates heat through a physical or chemical principle, can heat food or water only through simple activation, is widely applied to heating of military instant food, mountaineering and tourism and emergency guarantee of emergencies, and is developed from the eighties of the twentieth century in China, products based on quick lime, an aluminum water reaction system and a magnesium water reaction system are developed successively, wherein the quick lime heating agent is eliminated due to the defects of uncontrolled heat release, low heat productivity and the like; the aluminum water reaction system and the magnesium water reaction system are the types of heating agents widely used in the market at present in China.
The main principle of the aluminum water reaction system is that aluminum powder in the aluminum-based heating agent and alkaline substances are subjected to hydration reaction and simultaneously emit a large amount of heat, and the aluminum water reaction system is characterized by high heating speed and large heating value; however, the aluminum-based heat generating agent, when containing steam and hydrogen, has a large gas production rateWhen the gas in the gas is released from the packaging gap, the foamability is high, and the thickness of the nonwoven fabric used for the outer packaging of the aluminum-based exothermic agent is 60g/m2Above, the package that generates heat is easy to expand after meeting water, and water rapid permeability combines with the heating agent, causes the central temperature of package that generates heat to be less than 100 ℃, seriously influences the continuation and the steam temperature of follow-up reaction to lead to hot steam volume to be few, the material intensification is slow, can't satisfy the swift, convenient requirement of field self-heating food.
In the prior art, researches on self-heating food heating agents mainly focus on the formula of the heating agent, the improvement of an outer packaging material of a heating bag and a preparation method of the heating bag, so that the aim of improving the heating efficiency of the heating bag is fulfilled. For example, chinese patent publication No. CN 105751643A discloses "a non-woven fabric for a magnesium-based self-heating food heating agent and a method for preparing the same", which starts with a material of the non-woven fabric, an outer layer material is PET, an inner layer material is PP, and the bonding of the inner layer and the outer layer can improve the temperature rise performance, shorten the heat release time, and improve the hygiene performance of the product.
However, no report has been found so far on the improvement of the structural design of the heat generating pack to improve the thermal efficiency thereof, based on the problems of the reaction process of the heat generating pack itself.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a food heating bag with a double-layer nested structure.
In order to achieve the purpose, the invention adopts the following technical scheme:
the food heating bag with the double-layer nested structure is characterized by comprising a first heating bag and a second heating bag embedded in the first heating bag.
The first heating pack is of a bowl-like structure and comprises a hydrophobic top layer, a hydrophilic bottom layer arranged below the hydrophobic top layer and a first heating agent arranged in a containing cavity formed by the hydrophobic top layer and the hydrophilic bottom layer, wherein the first heating agent comprises quicklime and aluminum powder with the particle size of 300-600 mu m.
The second heating bag is composed of a hydrophilic packaging bag and a second heating agent arranged in the hydrophilic packaging bag, and the second heating agent comprises quicklime and aluminum powder with the particle size of 200-300 mu m.
In the technical scheme, the food heating bag further comprises an exhaust hole formed in the hydrophobic top layer.
Preferably, in the above technical solution, a hydrophilic exhaust layer is laid on the exhaust hole.
Further preferably, in the above technical solution, the vent hole is disposed in the center of the hydrophobic top layer.
Further, in the above technical solution, the second heat generating pack is disposed at the center of the accommodating chamber formed by the hydrophobic top layer and the hydrophilic bottom layer.
In the technical scheme, the hydrophobic top layer is of a planar structure, and the gram weight of the hydrophobic top layer is 60-200g/m2The hydrophobic nonwoven fabric of (1).
Preferably, in the above technical solution, the hydrophilic bottom layer is a curved surface structure with a grammage of 100-2The hydrophilic nonwoven fabric of (1).
Preferably, in the above technical solution, the gram weight of the hydrophilic packaging bag is 100-2The hydrophilic nonwoven fabric of (1).
In the above technical scheme, the gram weight of the hydrophilic exhaust layer is 100-2The hydrophilic nonwoven fabric of (1).
Further, in the above technical solution, the size of the vent hole is 0.02-0.10 times of the area of the hydrophobic top layer.
In the technical scheme, the volume of the second heating bag is 0.08-0.35 times of the volume of the first heating bag.
Further, in the above technical solution, the second heat generating pack has a spherical or ellipsoidal structure.
Still further, in the above technical scheme, the first exothermic agent is prepared from the following raw materials in parts by weight: 10-30 parts of quick lime, 0-20 parts of sodium carbonate, 0-20 parts of zeolite and 20-60 parts of aluminum powder with the particle size of 300-600 mu m.
Preferably, in the above technical solution, the second exothermic agent is prepared from the following raw materials in parts by weight: 10-30 parts of quick lime, 0-20 parts of sodium carbonate, 0-10 parts of magnesium chloride, 0-10 parts of bentonite, 0-10 parts of manganese dioxide, 0-10 parts of sodium stannate, 0-10 parts of sodium silicate and 20-60 parts of aluminum powder with the particle size of 200-300 mu m.
The invention has the advantages that:
the food heating bag is skillfully designed into a double-layer nested structure, the top layer and the bottom layer of the first heating bag at the outer side of the food heating bag are respectively made of hydrophobic materials and hydrophilic materials, the outer package of the second heating bag which is nested and arranged at the inner side of the first heating bag is made of hydrophilic materials, after the heating bag is added with water, the bottom layer of the first heating bag quickly absorbs water, the aluminum water reacts to release heat and hydrogen, the second heating bag absorbs little water or vapor, the aluminum water reaction quickly occurs, and because the water does not fully enter, the instantaneous temperature rapidly rises to 120 ℃ or even reaches 200 ℃, so that the water is quickly gasified, a great amount of high-temperature vapor is generated, the aluminum water reaction of the first heating bag is accelerated, and the duration is more than 10 min; at this moment, hydrogen and vapor that the aluminium water reaction produced can only follow the release of first heat generation bottom of package layer non-woven fabrics, have the condensation effect to the low temperature vapor that makes hydrogen carry reduces, and effective high-temperature vapor increases, and the steam volume is big, and the thermal efficiency promotes and is showing.
Drawings
Fig. 1 is a schematic structural diagram of a food heating bag with a double-layer nested structure according to embodiment 1 of the present invention;
FIG. 2 is a graph of reaction time versus temperature for a food warming bag having a double nested structure according to example 1 of the present invention;
in the figure:
the heating bag comprises a first heating bag 1, a hydrophobic top layer 11, a hydrophilic bottom layer 12, a first heating agent 13, an exhaust hole 14, a hydrophilic exhaust layer 15, a second heating bag 2, a hydrophilic packaging bag 21 and a second heating agent 22.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the following detailed description of the embodiments of the present invention is provided in connection with the embodiments. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.
Unless otherwise indicated, the technical means employed in the examples of the present invention are conventional means well known to those skilled in the art, and the reagents and products employed are also commercially available.
The source, trade name and if necessary the constituents of the reagents used are indicated at the first appearance.
Example 1
The embodiment of the invention provides a food heating bag with a double-layer nested structure, which is structurally shown in figure 1 and comprises a first heating bag 1 and a second heating bag 2, wherein the second heating bag 2 is embedded in the first heating bag 1.
Specifically, the first heating pack 1 is a bowl-like structure, and includes a hydrophobic top layer 11, a hydrophilic bottom layer 12 and a first heating agent 13, the hydrophilic bottom layer 12 is disposed below the hydrophobic top layer 11, the hydrophobic top layer 11 and the hydrophilic bottom layer 12 form an accommodating cavity, and the first heating agent 13 is disposed in the accommodating cavity.
In detail, the hydrophobic top layer 11 is further opened with an air vent 14, the air vent 14 is provided with a hydrophilic air vent layer 15, normally, the air vent 14 is arranged at the center of the hydrophobic top layer 11, the size of the air vent 14 is 0.02-0.10 times of the area of the hydrophobic top layer 11, and the hydrophilic air vent layer 15 has a grammage of 100-2The hydrophilic nonwoven fabric of (1).
In detail, the hydrophobic top layer 11 has a grammage of 120g/m2The hydrophobic nonwoven fabric of (2) is made into a planar structure; the hydrophilic base layer 12 has a grammage of 150g/m2The hydrophilic non-woven fabric is made into a curved surface structure; the first heating agent 13 is prepared from the following raw materials in parts by weight: 10-30 parts of quick lime, 0-20 parts of sodium carbonate, 0-20 parts of zeolite and 20-60 parts of aluminum powder with the particle size of 300-600 mu m.
Specifically, the first heat generation pack 1 has a bowl-shaped structure with a diameter of 10cm and a height of 6cm, and 40g of the first heat generation agent 13 is filled in the first heat generation pack 1.
Specifically, the second heat generating pack 2 has a spherical or ellipsoidal structure, and is composed of a hydrophilic packaging bag 21 and a second heat generating agent 22 disposed in the hydrophilic packaging bag 21,
in detail, the hydrophilic packaging bag 21 has a grammage of 150g/m2The hydrophilic nonwoven fabric of (4); the second exothermic agent 22 is prepared from the following raw materials in parts by weight: 10-30 parts of quick lime, 0-20 parts of sodium carbonate, 0-10 parts of magnesium chloride, 0-10 parts of bentonite, 0-10 parts of manganese dioxide, 0-10 parts of sodium stannate, 0-10 parts of sodium silicate and 20-60 parts of aluminum powder with the particle size of 200-300 mu m.
In addition, the volume of the second heat-generating pack 2 is 0.08 to 0.35 times the volume of the first heat-generating pack 1, and is disposed at the center of the receiving chamber formed by the hydrophobic top sheet 11 and the hydrophilic bottom sheet 12.
Specifically, in the embodiment of the invention, the second heat generation pack 2 is a spherical heat generation pack filled with 10g of the second heat generating agent 22.
150mL of water was added to the food heating bag having the double-nested structure, and the change in the center temperature of the heating agent and the change in the water temperature were detected by a temperature probe, and the results are shown in FIG. 2.
As can be seen from the results in FIG. 2, after water is added to the heating bag, the lower non-woven fabric absorbs water rapidly, and the aluminum water reacts to release heat and hydrogen. The central heating bag absorbs a small amount of water or water vapor, the aluminum water reaction is rapidly carried out, because the water does not fully enter, the instantaneous temperature is rapidly increased to 120 ℃ or even reaches 200 ℃, the central hot point enables the water to be rapidly gasified, a large amount of high-temperature water vapor is generated, and the aluminum water reaction of the outer layer is accelerated and lasts for more than 10 min. The hydrogen and the vapor generated by the aluminum water reaction can only be released from the lower non-woven fabric, and a condensation effect exists, so that the low-temperature vapor carried by the hydrogen is reduced, and the effective high-temperature vapor is increased.
Comparative example 1
A commercial common food heating bag with a non-double-layer nested structure is taken to carry out a comparative experiment with the food heating bag provided by the embodiment 1 of the invention. After water is added into a common food heating bag with a non-double-layer nested structure sold in the market, the central temperature is always lower than 110 ℃, a large amount of low-temperature water vapor carried by hydrogen is dissipated, and the continuous effect and the heating efficiency of the heating bag are seriously influenced.
Comparing and analyzing the results of the embodiment 1 and the comparative example 1, it can be seen that the food heating bag provided by the embodiment of the present invention is skillfully designed into a double-layer nested structure, the top layer and the bottom layer of the first heating bag at the outer side of the food heating bag are respectively made of hydrophobic materials and hydrophilic materials, the outer package of the second heating bag nested inside the first heating bag is made of hydrophilic materials, after water is added into the heating bag, the bottom layer of the first heating bag rapidly absorbs water, the aluminum water reacts to release heat and hydrogen, the second heating bag absorbs little water or water vapor, the aluminum water reaction rapidly occurs, because water does not sufficiently enter, the instantaneous temperature rapidly rises to 120 ℃, even to 200 ℃, so that water is rapidly gasified to generate a great amount of high-temperature water vapor, and the aluminum water reaction of the first heating bag is accelerated and lasts for more than 10 min; at this moment, hydrogen and vapor that the aluminium water reaction produced can only follow the release of first heat generation bottom of package layer non-woven fabrics, have the condensation effect to the low temperature vapor that makes hydrogen carry reduces, and effective high-temperature vapor increases, and the steam volume is big, and the thermal efficiency promotes and is showing.
Finally, the above is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. The food heating bag with the double-layer nested structure is characterized by comprising a first heating bag and a second heating bag embedded in the first heating bag, wherein the volume of the second heating bag is 0.08-0.35 times that of the first heating bag;
the first heating bag is of a bowl-like structure and comprises a hydrophobic top layer, a hydrophilic bottom layer arranged below the hydrophobic top layer and a first heating agent arranged in a containing cavity formed by the hydrophobic top layer and the hydrophilic bottom layer, wherein the first heating agent comprises quicklime and aluminum powder with the particle size of 300-600 mu m;
the second heating bag consists of a hydrophilic packaging bag and a second heating agent arranged in the hydrophilic packaging bag, and the second heating agent comprises quicklime and aluminum powder with the particle size of 200-;
after water is added into the food heating bag, the hydrophilic bottom layer of the first heating bag absorbs water rapidly, the first heating agent reacts to release heat and hydrogen, the second heating bag absorbs a small amount of water or water vapor and generates an aluminum water reaction rapidly, so that water is gasified rapidly, a large amount of high-temperature water vapor is generated, the aluminum water reaction of the first heating bag is accelerated and lasts for more than 10min, and hydrogen and water vapor generated by the aluminum water reaction can be released only from the hydrophilic bottom layer of the first heating bag.
2. The food warming pack according to claim 1, further comprising a vent disposed on the hydrophobic top layer; preferably, a hydrophilic exhaust layer is paved on the exhaust holes.
3. The food warming pack according to claim 2, wherein said vent is centrally disposed in said hydrophobic top layer.
4. The food warming pack according to any one of claims 1 to 3, wherein the second warming pack is disposed in the center of the receiving cavity formed by the hydrophobic top layer and the hydrophilic bottom layer.
5. The food warming packet according to claim 1,
the hydrophobic top layer is of a planar structure and has a gram weight of 60-200g/m2The hydrophobic nonwoven fabric of (1);
and/or the hydrophilic bottom layer is a curved surface structure with the gram weight of 100-2The hydrophilic nonwoven fabric of (4);
and/or the hydrophilic packaging bag has the gram weight of 100-200g/m2The hydrophilic nonwoven fabric of (1).
6. The heat generation package as claimed in claim 2, wherein the hydrophilic air-release layer is formed by a material having a grammage of 100-200g/m2The hydrophilic nonwoven fabric of (1).
7. Food warming pack according to claim 2 or 6 wherein the vent holes have a hole size of 0.02 to 0.10 times the area of the hydrophobic top layer.
8. The food warming pack according to claim 1, wherein said second warming pack has a spherical or ellipsoidal configuration.
9. The food warming packet according to claim 1,
the first heating agent is prepared from the following raw materials in parts by weight: 10-30 parts of quick lime, 0-20 parts of sodium carbonate, 0-20 parts of zeolite and 20-60 parts of aluminum powder with the particle size of 300-;
and/or the second heating agent is prepared from the following raw materials in parts by weight: 10-30 parts of quick lime, 0-20 parts of sodium carbonate, 0-10 parts of magnesium chloride, 0-10 parts of bentonite, 0-10 parts of manganese dioxide, 0-10 parts of sodium stannate, 0-10 parts of sodium silicate and 20-60 parts of aluminum powder with the particle size of 200-300 mu m.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811123386.XA CN109381039B (en) | 2018-09-26 | 2018-09-26 | Food heating bag with double-layer nested structure |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811123386.XA CN109381039B (en) | 2018-09-26 | 2018-09-26 | Food heating bag with double-layer nested structure |
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| CN109381039A CN109381039A (en) | 2019-02-26 |
| CN109381039B true CN109381039B (en) | 2020-07-07 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111657750A (en) * | 2019-03-08 | 2020-09-15 | 天津大学 | Portable self-heating bag |
| CN113576268B (en) * | 2020-04-30 | 2022-10-11 | 中国科学院大连化学物理研究所 | Self-heating assembly and preparation method |
| CN112680199A (en) * | 2020-12-29 | 2021-04-20 | 温州凯培电子商务秘书有限公司 | Multilayer self-heating food heating bag and preparation method thereof |
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| CN101055120A (en) * | 2007-04-30 | 2007-10-17 | 王卫东 | Portable self-heating bag |
| KR101099049B1 (en) * | 2009-11-20 | 2011-12-26 | 주식회사 크라우젠 | Pack and package for heating content including the same |
| CN105751643A (en) * | 2014-12-19 | 2016-07-13 | 中国航天科工集团八五研究所 | Nonwoven fabric used for magnesium series self-heating food heating agent, and preparation method thereof |
| BR102013009107A2 (en) * | 2013-04-15 | 2017-05-09 | Luiz Bellix Favrin José | Improvement in a flameless chemical heater applied to the heating of packaged foods in high barrier packaging in the form of sachets |
| CN107115174A (en) * | 2017-06-21 | 2017-09-01 | 沈水木 | The hot compress heating bag of stable heating |
| CN107307938A (en) * | 2017-06-21 | 2017-11-03 | 沈水木 | The hot compress heating bag of persistent fever |
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2018
- 2018-09-26 CN CN201811123386.XA patent/CN109381039B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101055120A (en) * | 2007-04-30 | 2007-10-17 | 王卫东 | Portable self-heating bag |
| KR101099049B1 (en) * | 2009-11-20 | 2011-12-26 | 주식회사 크라우젠 | Pack and package for heating content including the same |
| BR102013009107A2 (en) * | 2013-04-15 | 2017-05-09 | Luiz Bellix Favrin José | Improvement in a flameless chemical heater applied to the heating of packaged foods in high barrier packaging in the form of sachets |
| CN105751643A (en) * | 2014-12-19 | 2016-07-13 | 中国航天科工集团八五研究所 | Nonwoven fabric used for magnesium series self-heating food heating agent, and preparation method thereof |
| CN107115174A (en) * | 2017-06-21 | 2017-09-01 | 沈水木 | The hot compress heating bag of stable heating |
| CN107307938A (en) * | 2017-06-21 | 2017-11-03 | 沈水木 | The hot compress heating bag of persistent fever |
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